Comparative Study of Post-processing Techniques for Enhancing the Corrosion Resistance, Microstructure, and Mechanical Properties of SLM-Produced 316L Stainless Steel

Additive manufacturing has gained popularity for creating complex-shaped, high-precision components. One such method is Selective Laser Melting (SLM), commonly used to produce metallic parts like 316L stainless steel. However, SLM-produced components may have internal defects and rough surface textures, compromising their durability. To address this, post-processing techniques have been developed to enhance the mechanical properties and surface smoothness of 316L stainless steel parts manufactured via SLM. This article provides an extensive overview of current research on how post-processing techniques affect the surface roughness and mechanical properties of 316L stainless steel produced through SLM. It covers the fundamentals of SLM technology, characteristics of 316L stainless steel, and recent research on post-processing techniques. Laser polishing, a well-studied technique, can improve surface roughness and corrosion resistance but is influenced by various factors. Heat treatment is another researched procedure that enhances ductility and toughness. Post-processing can improve surface roughness, corrosion resistance, and mechanical properties. However, careful assessment based on application requirements is crucial. The review paper provides valuable insights into SLM-produced 316L stainless steel and future research prospects.